All categories

3 years ago

Plz i need help luv u

Mathematics

1 answer:

aleksandr82 [10.1K]3 years ago

6 0

Step-by-step explanation:

4x/6=7x+5/3

<=> 4x.3=(7x+5).6

<=> 12x=42x+30

<=> -30x=30

<=>x=-1

You might be interested in

Frank marry and seth shared some sweets in the ratio 4:5:7 seth got 18 more sweets than frank work out the total number of sweet

Alina [70]

Answer: 96

seth got 18 more than frank

in terms of ratio he got 3 more than frank

this means that 3 is equal to 18

so we find the whole ratio to fing the total

3 0

3 years ago

If x^2+1/x^2=3 find the value of x^2/(x^2+1)^2<br> Express answer as a common fraction.<br> Thanks!!

timama [110]

$x^2+\dfrac1{x^2}=3\implies x^4+1=3x^2\implies x^4-3x^2+1=0$

By the quadratic formula,

$x^2=\dfrac{3\pm\sqrt5}2\implies x^2+1=\dfrac{5\pm\sqrt5}2$

Then

$(x^2+1)^2=\dfrac{25\pm10\sqrt5+5}4=\dfrac{15\pm5\sqrt5}2$

$\implies\dfrac{x^2}{(x^2+1)^2}=\dfrac{\frac{3\pm\sqrt5}2}{\frac{15\pm5\sqrt5}2}=\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}$

Multiply numerator and denominator by the denominator's conjugate:

$\dfrac{3\pm\sqrt5}{15\pm5\sqrt5}\cdot\dfrac{15\mp5\sqrt5}{15\mp5\sqrt5}=\dfrac{45\pm15\sqrt5\mp15\sqrt5-25}{15^2-(5\sqrt5)^2}=\dfrac{20}{100}=\dfrac15$

3 0

3 years ago

What is 3 1/8 - 1 7/8

Gekata [30.6K]

Answer:

Exact Form: 5 /4

Decimal Form: 1.25

Mixed Number Form:

1 -----

(I put it in different forms because you did not specify how you wanted your answer)

Please mark me brainliest if this helped (I need It)

3 0

3 years ago

Which of the x-values are solutions to the following inequality? x<365

vladimir1956 [14]

Answer:

Choice A ; Choice B

Step-by-step explanation:

x < 365

x ∈ ( -oo ; 365 )

Solutions :

Choice A

x = 99

Choice B

x = 361

7 0

3 years ago

What is 14/9k+13/9-2k+2/9+2/9k-6

Ierofanga [76]

Answer:

both answers are pictures below

Step-by-step explanation:

8 0

4 years ago